>North American Chironomus: C. vockerothi

Species 3w. C. vockerothi Rasmussen.
Was placed in the subgenus Camptochironomus.

Adult:
Description based on that of Rasmaussen, 1984.

Male:
A mostly dark species, with the hypopygium somewhat darker.

Paratype male of C. vockerothi
a. antenna; b. hypopygium; c. Superior volsella (note the length); d. gonostylus.

Wing length 3.1-3.7 mm.  AR 2.0-2.35.  Fore LR 0.95-1.09.
Wing squama with 19-25 marginal setae.
Head: Frontal tubercles present.  Clypeus with 21-38 setae.
Thorax: Mesonotal tubercle well developed.  Setae: Acrostichal 8-16; Dorsocentral 25-54, uni- to tri-serial; Prealars 7-14, uni- to bi-serial; Scutellars 29-46, uniserial laterally to multiserial medially.
Legs (micron):

	Fe	Ti	Ta1	Ta2	Ta3
PI	1610	1310	1450	820	620
PII	1530	1550	690	470	370
PIII	1680	1760	940	580	510
	Ta4	Ta5	LR	F/T	BR
PI	440	260	0.95-1.09	1.14	1.05-1.24
PII	270	200	0.44-0.45	0.99	-
PIII	310	210	0.53	0.95-0.96	-

Male terminalia enlarged, suggesting the species mates on the substrate. Gonostyli strongly curved; anal point broad with a squared off end; with two setose lobes flaking it. Superior volsella large, darkly pigmented, curved ventrally towards the apex, and lacking setae. Inferior volsella long and narrow.

Female:

Coloration, wing length, squamal setation, and thoracic characters stated to be similar to those of the male.
Additional information from paratype 18183:
Wing length abt. 3.50 mm, width abt 0.94 mm., VR 1.00-1.01. SCf on brachiolum - abt 4.
Antennal proportions (micron): 105 : 80 : 98 : 113 : 185. AR about 0.47, A5/A1 about 1.76.
Palp proportions (segs. 2-5) (micron): 80 : 180 : 173 : >245 (shrivelled). 37 clypeal bristles
Thoracis setae: abt. 12 acrostichals; 19-23 dorsomedial; 6 prealar; scutellars in 2 approximate rows 24 in anterior, 12 in posterior row.

Legs (micron):

	Fe	Ti	Ta1	Ta2	Ta3
PI	1080	1120	1080	620	500
PII	1300	1260	620	380	300
PIII	1420	1420	900	540	460
	Ta4	Ta5	LR	F/T	Ta5/Ti
PI	360	180	0.96-1.25	0.96	0.16
PII	200	180	0.42-0.49	1.03	0.14
PIII	260	180	0.57-0.65	1.00	0.13

Genitalia: Dorsomesal lobe somewhat reduced, with inner margin distincly sclerotized. Gonocoxite IX small with 1-2 setae. Segment X large and produced into posterolateral lobes, each bearing 22-35 setae. Ventrolateral lobe short, apodemal lobe small and on most specimens indistinct.

Pupa, Larva and Cytology not known

Found: Alberta - Elkwater (Type); Hastings Lake.

Adult only described by Rasmussen (1984).
Distinguished from C. dilutus and C. pallidivittatus by the smaller size and well developed mesonotal tubercle. The males can be distinguished by the long superior volsella; females by the long extended gonopophysis X.

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Species 3w. C. vockerothi Rasmussen. Was placed in the subgenus Camptochironomus.

Species 3w. C. vockerothi Rasmussen.
Was placed in the subgenus Camptochironomus.